摘要
针对平行双回串联补偿输电线路,介绍了一种基于电压与电流积分的距离保护算法。通过对由故障相电压和电流、故障回路和相邻回路零序电流组成的方程组进行积分并求解,故障距离可以准确求出。新算法效果使用PSCAD/EMTDC软件建立的500 k V平行双回串联补偿线路模型进行验证。与传统算法和采用相邻一回零序电流的算法相比,结果显示新算法具有更高的可靠性和准确性。因此,新算法的应用可以提高电力系统稳定性。
A distance protection algorithm using integral voltage and current is proposed for the series compensated parallel transmission lines. The fault location can be accurately calculated by solving the equations consisting of integral fault phase voltage and current, fault circuit and adjacent circuit zero-sequence currents. Performance of the novel algorithm was validated using a 500 kV series compensated parallel transmission lines simulated by PSCAD/EMTDC software. Compared with the traditional and cross-connection schemes, the results show that the proposed algorithm is more reliable and accurate. Hence, the application of the proposed algorithm can increase the power system stability.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第12期3018-3025,共8页
Proceedings of the CSEE
关键词
距离保护
串联补偿
双回线路
积分算法
单相接地故障
distance protection
series comperisation
double-circuit lines
integral algorithm
single-phase to groundfault
